#include <iostream>
#include <unistd.h>
#include <pthread.h>
#include <string>

int ticket = 1000;
pthread_spinlock_t lock;

void *routine(void *arg)
{
    char *id = (char*)arg;
    while(1){
        if (ticket > 0){
            usleep(1000);
            printf("%s sells ticket:%d\n", id, ticket);
            ticket--;
        }
        else{
            break;
        }
    }
    return nullptr;
}

int main(){
    pthread_t t1, t2, t3, t4;
    pthread_create(&t1, NULL, routine, (void *) "thread-1");
    pthread_create(&t2, NULL, routine, (void *) "thread-2");
    pthread_create(&t3, NULL, routine, (void *) "thread-3");
    pthread_create(&t4, NULL, routine, (void *) "thread-4");

    pthread_join(t1, NULL);
    pthread_join(t2, NULL);
    pthread_join(t3, NULL);
    pthread_join(t4, NULL);

    return 0;
}